From: Aaron Conole <aconole@redhat.com>
To: dev@dpdk.org
Cc: stable@dpdk.org, John Daley <johndale@cisco.com>,
Bruce Richardson <bruce.richardson@intel.com>
Subject: [dpdk-dev] [PATCH] enic: check for nb_free > 0
Date: Wed, 2 Aug 2017 14:02:13 -0400 [thread overview]
Message-ID: <20170802180213.28736-1-aconole@redhat.com> (raw)
Occasionally, the amount of packets to free from the work queue ends
perfectly on a boundary to have nb_free = 0 and pool = 0. This causes
a segfault as follows:
(gdb) bt
#0 rte_mempool_default_cache (mp=<optimized out>, mp=<optimized out>,
lcore_id=<optimized out>)
at /usr/src/debug/openvswitch-2.6.1/dpdk-16.11/x86_64-native-linuxapp-gcc/include/rte_mempool.h:1017
#1 rte_mempool_put_bulk (n=0, obj_table=0x7f10deff2530, mp=0x0)
at /usr/src/debug/openvswitch-2.6.1/dpdk-16.11/x86_64-native-linuxapp-gcc/include/rte_mempool.h:1174
#2 enic_free_wq_bufs (wq=wq@entry=0x7efabffcd5b0,
completed_index=completed_index@entry=33)
at /usr/src/debug/openvswitch-2.6.1/dpdk-16.11/drivers/net/enic/enic_rxtx.c:429
#3 0x00007f11e9c86e17 in enic_cleanup_wq (enic=<optimized out>,
wq=wq@entry=0x7efabffcd5b0)
at /usr/src/debug/openvswitch-2.6.1/dpdk-16.11/drivers/net/enic/enic_rxtx.c:442
#4 0x00007f11e9c86e5f in enic_xmit_pkts (tx_queue=0x7efabffcd5b0,
tx_pkts=0x7f10deffb1a8, nb_pkts=<optimized out>)
at /usr/src/debug/openvswitch-2.6.1/dpdk-16.11/drivers/net/enic/enic_rxtx.c:470
#5 0x00007f11e9e147ad in rte_eth_tx_burst (nb_pkts=<optimized out>,
tx_pkts=0x7f10deffb1a8, queue_id=0, port_id=<optimized out>)
This commit makes the enic wq driver match other drivers who call the
bulk free, by checking that there are actual packets to free.
Fixes: 36935afbc53c ("net/enic: refactor Tx mbuf recycling")
CC: stable@dpdk.org
Reported-by: Vincent S. Cojot <vcojot@redhat.com>
Reported-at: https://bugzilla.redhat.com/show_bug.cgi?id=1468631
Signed-off-by: Aaron Conole <aconole@redhat.com>
---
drivers/net/enic/enic_rxtx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/enic/enic_rxtx.c b/drivers/net/enic/enic_rxtx.c
index 5867acf..a39172f 100644
--- a/drivers/net/enic/enic_rxtx.c
+++ b/drivers/net/enic/enic_rxtx.c
@@ -503,7 +503,8 @@ static inline void enic_free_wq_bufs(struct vnic_wq *wq, u16 completed_index)
tail_idx = enic_ring_incr(desc_count, tail_idx);
}
- rte_mempool_put_bulk(pool, (void **)free, nb_free);
+ if (nb_free > 0)
+ rte_mempool_put_bulk(pool, (void **)free, nb_free);
wq->tail_idx = tail_idx;
wq->ring.desc_avail += nb_to_free;
--
2.9.4
next reply other threads:[~2017-08-02 18:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-02 18:02 Aaron Conole [this message]
2017-08-02 18:34 ` John Daley (johndale)
2017-08-03 20:58 ` [dpdk-dev] [dpdk-stable] " Thomas Monjalon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170802180213.28736-1-aconole@redhat.com \
--to=aconole@redhat.com \
--cc=bruce.richardson@intel.com \
--cc=dev@dpdk.org \
--cc=johndale@cisco.com \
--cc=stable@dpdk.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).